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Because there was a malfunction with the communications controller of the backbone network equipment, ACCC will be performing maintenance as follows:

Date: Friday, February 9, 2018 11:25 A.M. – 12:15 P.M.
Summary: reset of some part of the backbone network equipment
Impact: During this maintenance, access to the campus network will be interrupted for about 5 minutes twice in all campus areas including remote locations.

ACCC will be changing the security policies on utwlan-x, one of the campus wireless networks on Monday, January 22, 2018 between 11:25 A.M. and 12:15 P.M.
After the change, communications activities over the network will be restricted as follows:

1) Incoming communications from outside the network will be blocked.
2) Outgoing communications from the network will be permitted in principle. However, the following types of communications will be blocked:
– P2P file sharing
– Attacks exploiting vulnerabilities
– Spyware and malware
– DNS queries searching for website names malware use
– Transmission and reception of files containing computer viruses
– Access to websites doing activities such as malware distribution, remote control and phishing.
These restrictions will be implemented in accordance with the standard configuration set by the manufacturer of the campus firewall. After confirming that the change has caused no problems, ACCC will accordingly change the security policies on other campus wireless networks including utwlan-w.

During the change work, communications may be cut off on utwlan-x. If that happens, try accessing after a while

ACCC will be conducting maintenance on the backbone network as follows:

Date: Tuesday, February 20, 2018 12:00 P.M. – 4:00 P.M.
Impact: During this period, the campus network will be interrupted up to 20 minutes twice.

This maintenance was already rescheduled, but the date has been changed again for urgent reasons.
The maintenance is necessary for the safe and secure operation of the campus network. We ask for your understanding and cooperation.

Some outside organization have recently pointed out many incidents occurring on campus related to access to certain inappropriate websites, so ACCC has decided to block access to them from the On-Campus Wi-Fi System during the university winter closure.

Apple On Campus (AOC) Web access is now available, as the system preparation work has been completed.
(However, the linked Apple site is only available in Japanese. You can also use phone call in English to “Apple Store Call Center” as before.)

ACCC will be performing maintenance on backbone network equipment as follows:

Date: Monday, December 4, 2017 11:25 AM – 12:15 PM
Summary: Maintenance on equipment of the backbone network
During the maintenance, the campus network will be momentarily interrupted twice in all campus areas including remote areas.

Wi-Fi Protected Access II (WPA2) is a standard for encrypted communications on wireless LAN (Wi-Fi) networks, and it has been announced that some vulnerabilities are discovered in WPA2, such as encryption key theft. If a third party exploits the vulnerabilities within the range of a wireless network, your communications on the network can be intercepted. To defend against these vulnerabilities, you need to install updates to affected products.

Individual users should take the following precautions:
– Install updates to fix the vulnerabilities.
Microsoft released security updates in October, 2017.
【Microsoft Corporation Information for VU#228519】
https://www.kb.cert.org/vuls/id/CHEU-AQNMYP

If new security updates are not available for your OS, consider doing the following:

– Avoid sending important information from a website whose URL starts with “http”.
– Use a VPN.
– Use a wired network.